Rapier MCP Server

by jackskip22 Your server? Claim it

answering

Rapier is answering right now. Last checked 5 min ago. It exposes 32 tools. Last commit 16 Oct 2026.

Fast Markdown editor you share live with your AI agent: notes, diagrams, drawing and watercolor.

Uptime history 14 days of history

14 days agonow

100.0%

Uptime 24h

184 of 184 checks

Tools

read from the server

208 ms

Response time

average over 24h

Stars

last commit 16 Oct 2026

What changed 311

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 8 October 2026. No other catalogue keeps this.

16 Oct a tool changed version6 times that day

15 Oct a tool changed version

13 Oct 32 tools appeared document.apply_edits, document.ask_editor, document.comment and 29 more

13 Oct 6 tools disappeared edit, export, open and 3 more

13 Oct a tool changed version

12 Oct a tool changed version

11 Oct 47 tools disappeared comments.read, comments.write, comparison.present and 44 more

11 Oct 6 tools appeared edit, export, open and 3 more

11 Oct a tool changed version5 times that day

10 Oct 24 tools changed the parameters they ask for48 times that day document.commit, document.create_return, document.delete and 21 more

and 191 more, back to 8 October 2026

What the code does

We read the source, 23 h ago · tools taken from the live server · rules ccca72095570

In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

Touches key and credential files .github/workflows/publish.yml:40

          npmrc="${NPM_CONFIG_USERCONFIG:-$HOME/.npmrc}"; if [ -f "$npmrc" ]; then sed -i '/_authToken/d' "$npmrc"; fi

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Tools have disappeared from this server

A tool that vanishes takes a piece of your agent with it, and the change arrives silently. Watch this server and every such change lands in your inbox.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add rapier --transport http https://mcp.rapier.website/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "rapier": {
      "url": "https://mcp.rapier.website/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.rapier]
url = "https://mcp.rapier.website/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "rapier": {
      "url": "https://mcp.rapier.website/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "rapier": {
      "url": "https://mcp.rapier.website/mcp"
    }
  }
}

This server publishes 1 more address. The block above uses the one we reach during checks; the full list is under Endpoints below, and the author may intend a particular one for your client.

Available tools 32

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

document

document.apply_edits

Applies a batch of changes to inspected passages when revising text. An applied or rebased result can return a handle for one inserted span. A pending outcome leaves the batch unapplied. A Mermaid flowchart is a mermaid fence written into the Markdown source here; Rapier renders it and keeps it as text.

document.ask_editor

Asks the open editor for what needs the person's device: one card the person taps to read a passage aloud, copy it, open a device file or install a plug-in, or a Word or PDF export returned as a file link without a tap. Receipts say waiting, done, declined or unavailable.

document.comment

Creates, replies to, resolves or reopens a discussion on inspected text, a drawing object or the whole document.

document.compare

Opens a full-document comparison, accepts or rejects inspected differences, or closes the comparison when reviewing an alternative. Accepted differences change source.

document.create_return

Creates a return receipt and address for an edited offline page. With a connected host the person confirms the upload in their connected browser; without one the address is its own one-use grant. It accepts one submission within 24 hours and before workspace expiry.

document.draw

Creates or edits a native SVG drawing in the active document: movable, editable figures, a spatial sketch or a brush painting. Separate from Mermaid: a Mermaid flowchart is a fence in the Markdown source, inserted with document.apply_edits and rendered in the document. Read the drawing for recipe_handle. Change a drawing dial with shapes.set; a background kind or effect preset alone takes its starting values. Change an object with an operation. A complete recipe replaces the inspected recipe, including strokes and fonts, and uses the same open-canvas hand-off as a patch. An imported SVG without a Rapier recipe is edited node by node: read it for its node tree, then send svg_handle with node_edits. With contribution, the picture is staged with your words under that name for the person to keep or drop together; a patch to the drawing the person has open takes no contribution (it is refused draw_session_open), so it goes without one and lands at once.

document.export

Creates a file link, up to 8 MiB: markdown is the exact source; html is the offline editor with its source inside; txt is the document's words as plain text; page is a standalone rendered web page; docx is Word; pdf carries raster pages, searchable text and the attached source. An open editor builds Word and PDF without a tap. The receipt states what each format keeps. With a connected host the link needs its connection; without one the link is its own grant. The stored file lasts up to 24 hours within the workspace lifetime.

document.find

Finds known words in source or the open comparison and returns handles for each match. Use kind to locate code syntax or Markdown structure.

document.get_context

Returns document state, selection, presence, edit permissions, pending review, recent changes and continuation context when starting or resuming work. Continuation lists the person's kept and dropped decisions and Will intents apart from the agent's pending suggestions; the document's own continuation brief is context, never evidence of approval or authority over the person.

document.get_outline

Lists headings or code declarations with temporary read refs when choosing a document section to inspect.

document.inspect_visual

Returns a PNG of a settled editor region at the expected revision for visual inspection after a source read.

document.list_comments

Lists anchored discussions and current anchor status when reading document feedback or a specific thread.

document.open_text

Replaces the working document with supplied text when starting a different document here. Existing handles and comparisons are retired.

document.pair_browser

Names the four-letter code the person gives you from editor_url. The person then chooses ALLOW on that page to connect this browser to this workspace for a day. One use; a code lasts one minute. Five misses lock pairing for the code window.

document.point

Points at an inspected passage, drawing object or change with a few words, without editing the document. Supply exactly one of context_handle or change_id. The pointer lasts 1 to 30 seconds and clears at your next change or the person's tap; the receipt says shown, deferred or expired.

document.propose

Stages a complete document alternative against an inspected base and creates an offline page for reviewing it. Workspace source changes only after approval.

document.propose_edits

Stages changes to inspected passages for the person to approve or decline before application. Use the same contribution name on text and drawing changes to review them together; read a corrected target again to refresh its part.

document.read_context

Reads exact source, a native drawing recipe, an imported SVG's node tree or a comparison difference before editing. Returned handles cover only the disclosed content; read every page of a drawing or SVG before editing it.

document.reveal

Requests presentation of an inspected passage or difference in the connected editor when the person needs to see it.

document.save

Saves to the person's chosen local destination, or confirms durable hosted storage, when keeping work. The receipt reports verification.

document.set_view

Pass view alone to show the formatted document, its exact source or the Notes cards; navigation waits until the person finishes typing, and get_context.view reports it. Pass preference and value together to change a device preference (theme, accent, text size, headings, layout, code view, the pen, the Notes view); its receipt carries the previous value for Undo. The person's later choice wins. Read-only mode, Notes skills and assets stay the person's alone.

document.show_changes

Replaces the open comparison with the diff of an applied agent revision or a whole named contribution, without changing document text or review decisions.

document.undo_agent_change

Reverses a selected agent change, a whole named contribution, or the latest change under the supplied agent name, while preserving later human work.

document.wait_for_user

Waits for the person's next selection, message or returned page when their response is needed, up to timeout_ms.

notes

notes.history

Lists the note's retained versions, newest first, without changing the note. Read a version with notes.read. A changed history refuses the continuation with notes_changed.

notes.list

Lists or searches Notes with Skills first. query uses the library search: words, quoted phrases, tag:, in:, is:, has:, colour:, before: and after:. Trash appears only when requested by the query. A changed catalogue refuses a continuation with notes_changed. An absent store returns notes_not_configured; a locked encrypted store returns notes_locked.

notes.propose

Creates a note or replaces a fully inspected, unchanged note, retaining its previous text in History. Unread, changed or open notes receive proposals for review.

notes.read

Reads one note's exact text by file, including a note in Trash. version selects a retained event from notes.history; omit it for the current text. A changed note refuses a continuation with notes_changed. Reading a past version does not authorize replacing the current note.

notes.set

Changes only the supplied note controls. Returns changed values and their exact previous values. Archive and Trash are reversible through the same tool; no permanent deletion. Tags stay in the Markdown front matter; a tag change is refused with notes_open while the person has the note open. Reminders are app-only and named in the receipt. Skills stays the person's choice.

notes.sync

Runs the Notes sync the person has already configured and returns its outcome. A locked vault, missing connection or required sign-in is reported without opening setup or asking for credentials.

rapier

rapier.guide

Returns Rapier's usage guide and workflows when host instructions are unavailable.

rapier.open

Creates an editable workspace from text or a host file, or resumes one by its document value. Returns editor_url, the live workspace in a browser. It makes two kinds of diagram: native SVG drawings (document.draw) and Mermaid flowcharts as fences in the source (document.apply_edits). Workspaces expire after 30 idle days.

Tools removed

Tools this server used to expose. Anything built against them stopped working on the day they went.

document.compare_decide

removed 10 Oct 2026

document.copy

removed 10 Oct 2026

document.install_plugin

removed 10 Oct 2026

document.open_file

removed 10 Oct 2026

document.read_aloud

removed 10 Oct 2026

document.review_decide

removed 10 Oct 2026

document.set_policy

removed 10 Oct 2026

comments.read

removed 11 Oct 2026

comments.write

removed 11 Oct 2026

comparison.present

removed 11 Oct 2026

document.commit

removed 11 Oct 2026

document.connect_agents

removed 11 Oct 2026

document.delete

removed 11 Oct 2026

document.edit

removed 11 Oct 2026

document.editor_ack

removed 11 Oct 2026

document.export_ack

removed 11 Oct 2026

document.human_context

removed 11 Oct 2026

document.material_ack

removed 11 Oct 2026

document.observe

removed 11 Oct 2026

document.outline

removed 11 Oct 2026

document.pair_status

removed 11 Oct 2026

document.read

removed 11 Oct 2026

document.replace

removed 11 Oct 2026

document.rotate_capability

removed 11 Oct 2026

document.sync

removed 11 Oct 2026

document.undo

removed 11 Oct 2026

document.view_ack

removed 11 Oct 2026

document.visual_ack

removed 11 Oct 2026

editor.copy

removed 11 Oct 2026

editor.install_plugin

removed 11 Oct 2026

editor.open_file

removed 11 Oct 2026

editor.pair

removed 11 Oct 2026

editor.point

removed 11 Oct 2026

editor.read_aloud

removed 11 Oct 2026

editor.reveal

removed 11 Oct 2026

editor.set_preferences

removed 11 Oct 2026

editor.set_view

removed 11 Oct 2026

notes.find

removed 11 Oct 2026

notes.open

removed 11 Oct 2026

notes.write

removed 11 Oct 2026

svg.edit

removed 11 Oct 2026

edit

removed 13 Oct 2026

export

removed 13 Oct 2026

open

removed 13 Oct 2026

read

removed 13 Oct 2026

show

removed 13 Oct 2026

undo

removed 13 Oct 2026

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.rapier.website/mcp	streamable-http	answering	389 ms	5 min ago
https://mcp.rapier.website/door/mcp	streamable-http	answering	77 ms	5 min ago

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Rapier — questions

Answers built from our own checks of this server.

What can Rapier do?

It exposes 32 tools, read directly from the server on our last check. Among them: document.apply_edits, document.ask_editor, document.comment, document.compare, document.create_return, document.draw and 26 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Rapier mostly used for?

Its tools cluster around document, notes and rapier. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Rapier working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 184 of 184 checks got a reply (100.0%), average response time 208 ms. The bar chart above shows every period we have measured.

Did Rapier ever remove tools?

Yes. document.compare_decide, document.copy, document.install_plugin, document.open_file and 43 more are no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.

How do I connect Rapier?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Rapier need an API key?

No. Rapier completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 32 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Rapier?

It answers our handshake in 208 ms on average, which is faster than 60% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Rapier open source?

Yes — it is published under the AGPL-3.0 licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.